HTTP 428 Precondition Required

Status code 428 · Class 4xx

HTTP

Precondition Required

HTTP request chain from browser through CDN and proxy to the origin server
HTTP errors: find which hop in the request chain failed and read its logs.

What it means

HTTP_428 is a HTTP error code reported by web servers and HTTP clients. Its official message is: “Precondition Required”

How to fix HTTP 428 Precondition Required

  1. Check the exact method, headers and payload your client is sending with 'curl -v' for comparison

Related errors

HTTP 429 Too Many RequestsHTTP 431 Request Header Fields Too LargeHTTP 422 Unprocessable ContentHTTP 302 FoundHTTP 304 Not ModifiedHTTP 400 Bad RequestHTTP 401 UnauthorizedHTTP 403 Forbidden

Source: IANA HTTP Status Code Registry

Last updated: